Drafting appliance or equipment



R. J. BUSTILLO Y DIEGO. DRAFTING APPLIANCE 0R E MENT.

APPLICATION FILED JULYI, 9.

1,391,530; I v t sept 20,1921.

3 sun's-SHEET n.

TIE:- -E

12.1 BUSTILLO Y DIEGO.

DRAFTING APPLIANCE 0R EQUIPMENT. APPLICATION FILED JULYI, I919- 1,391,530. Y te S pt. 20,1921.

3 SHEETS-SHEET 2.

13 \FT690ooooooooo0 B. J. BUSTILLO Y DIEGO.

DRAFTING APPLIANCE 0R EQUIPMENT.

APPLICATION FILED mun, 1919.

j 1,391,530. PatentedSept. 20; 1921.

3 SHEETS-SHEET 3- UNITED STATES;

I I a itio s/eventual To all whom. it may concern:

Be it known that I, RAMON J. BUs'rILLo Y DIEGO, a citizen of the Republic of Cuba, residing at Habana, Cuba, have invented certain new and useful Improvements in Drafting Appliances or Equipments, of which the following is a specification.

This invention relates to an improved drafting-appliance or equipment conceived as having educational value, especially intended and adapted for use by children for the purposesof theirinstruction, and also of stimulating their originative or creative faculties 1n a manner calculated to afford entertainment and arouse and maintain their interest. In this aspect the improved appliance or equipment is simple and inexpensive and has the general character of an educational toy whose use combines the operations of the mind and of the-hand and is, there fore, conducive to a quickening and broad-' ening of the mental development of children at the age suitabl for the primary grades, apart from affording instruction in the specific subject to which such use relates. This subject is the formation of geometrical out-' lines and their combination through an indefinite range into figures and designs; and the use of the equipment contemplates the production of wellknown conventional figures, the copying of designs, the creation of designs, and, in general, the combination, consistent with some basis of relationship, of varying geometrical outlines ,or forms.

For such objects and purposes the equip- .ment consists of a number of templets, and

of an active element, forfconvenience termed a scriber, by which the pattern lines-may be reproduced on-paper; .and the invention consists in certain structuralfeatures appertaining to. the templets, the scriber'and the combination of the two, as will be'set forth in detail in the succeeding: description.

An embodiment of the invention is illustrated I in the accompanying drawings, wherein: I v

Figure 1 isagroup of plan views of nine different-templets. .In connection with this figur it is to beobserved that any desired number of different templets rnay be provided, either greater or less than the number chosen for illustration, and that the only limitation on the number of outlines available forselection' is that which is imposed by'the requirement that the outline as em- .the others.

in Fig. 3.

ATE NT orF cE.

CE OR EQUIPMENT.

Specification of Letters Patent. Pateflted Sept. 20, 1921; Application filed July 1, 1919. Serial No. 308,031.

bodied in the templet must be adaptable for I called a templet but which, in fact is an auxiliary part of the equipment adapted more particularly to the scribing of circles and to the selective graduation or' marking into divisions of the circles scribed." The auxiliary templet shown in this figure has'its perimeter marked off into a certain number of equal divisions and the equipment, may contain one or several of] such auxiliary templets; in the latter case each auxiliary templet will be graduated differently from shown in vFig.3. v i

Fig. 5 is a plan view of the scriber. Fig. 6 is a side elevation thereof.

Fig. 7 is a plan view showing the scriber as used in connection with one, of thetemplets shown in Fig. 1.

- Fig. 8 is a plan view showingthe scriber as-used in connectionwith the templet shown Fig. 4 is an edge elevation of the templet Similar characters of reference designate corresponding parts throughout the several Views. 7

The templetsl'are in the form of plates .of any suitable material having theirupper and under faces substantially 'fiat or otherwise formed to provide uniform and extensive bearing surfaces and having their edges, or portions of their edges, formed lineallyin the outline of the patterns to be reproduced; and said templets are intended to be securely fastened over orin adjacency to the sheet of paper on whichthe lines, figures or designsiare to be drawn. Their flat under faces havejstableand extensive bearing upon the drawing board vor other support; and thetemplets are held in position by a pair of thumbtacks. For this purpose their upper faces are formed with recesses 2, and apertures 3-extend from said recesses to their under'faces. Theheads of the thumb tacks are arranged in countersunk relation in the recesses 2 and the pointed shanks of such tacks extend through the apertures 3 into the ing fixed relatively 'to the templets and being preferably permanently secured "thereon.

The pins rare preferably located centrally with respect to 'the 'pattern edge of the t'einple't. p 7 The nine cempi'ets shown inFig. 1 are distinguished bythe letters A to I inclusive and their'pattern outlines areas follows; that of A a circle, of B the elevation of an egg,' of a paraboliccnrv'e, of D an ellipse, of E and F different ovals, of Ga semicircle, .of H

7 is not required a'cycl'o'idal curve, and of I an epicyclo'idal curve. The "teinp-let-e shown in Figslf3, and 14 isf intended for use where cireles are 'to be marked off into equal divisions and it differs from thetemplets shown in Fig; 1 in that its'u pper face is provided, adjacent its periphery, with a number of equally spaced graduating marks'6 and in that its perifphery I as a pattern edge 'andjtheres fore, need notbe relied on for the pattern function discharged by the edges or portions of the edgesof the several 'templets shown in Fig. 1. In'otheryrespects, the templet 5 has the structural features and the functions of the templets shown in Fig, 1Q The graduations 6 may be provided 'injany-desired number. For example, the templet 5 as shown has twenty-four graduations, but it might equally well have a smallerjor larger number offgraduationsffor example,

eighteen orvthirt'y, 'the only requirement being that the number shall have a sufficient niim'ber of multiples to enable several selecarm for the fractional'division'of the circle.

It is obvious tha'tth range of selection may be increased by providing two or more templets similar to "the templets '5 but differing from oneanother n their number of ,gradua'tions,

q for example, two. additional templets provided with eighteen and thirty g'raduations respectively. It is also obvious that the v graduating 'na1'ks iI1ay have any v suitable form. As "shown, they are formed ,as small indentationsnearfthe' periphery of the teiiipl'e't; but they might} equally well be formed as radial lines or as notches in "the 'peripher the only requirement :being that theyjsh'allbe readily visible onlooking at :the-i t pr face 6f the temple;

he scriber shown in 'Figs' 5 Gis desi'g nedito eoepe'ratjewith any of the temple ts' as an arm Ifidvabie in relation theretoand slot'10 for cooperation with the pinsjL-of scriber consists of a relatively long straight part, preferably of metal and having a desirable lightness "and thinness, which part has a guiding portion 7 and a scribing portion 8. The ortions 7 and 8 are preferably offset in parzillel planes wherebythe portion 7 may bear extensively upon the flat upper face of the templet and the portion 8 may bear upon the sheet o-fpaper on "which the lines, figures or designs are to be drawn. The portion '8 is resilient and,' if, for any reason, it should-be desired to lift said portion slightly above'the sheet of paper, without displacing the scriber relatively to the templet, this can readily be done by means of'an u'p-turned lip 9 at the free "end of the portion. 8. The guiding portion 7; is pro- 1 "vided with a relatively long longitudinal the templets '1. This slot mayi'li'kewise co-, operate, with the similar "pin of the te'mplet 2; but for coeperation'w ith the pin of'the templet 5 theguiding'po'rt-ion 7 is preferably t0.

provided with an aperture 11 conforming to said pin and arranged at one side of "the slot 10'. For coaperatien withthe patternedges of the templets "l' the guiding portion- 7 is also provided with "depending pin 12 whichbe'ars against 5 said edges and 'inconjunction'with the slot 10am pin 4fp're- "scribes the movement of "the sdrib'er, causing it to follow'the pattern edges. I V ment of the scrib er is. conveniently' e'fiected 31:00

' The moveby a finger-pieced?) which projects in upright-relation and isfpreferably mounted upon the guiding portion'sm The pencil or stylus is, of course, heldin fiXed relation to d g P rtion 8 and "the latteris' so r05] constructed thatsaidpencil or stylu's may be located at different points in thelength of said scribing portion, thereby to enable variations in' 'the amplitude oftheTline orgfig- 1 Q ure drawn.

I preferred to pr'ovidethejscribing' portion 8 with a longitudinal rowfof somewhat closely {associated apertures 14 which are arrangedithroughoatithe'l'ength of said scribing portion and through any one lflt v of which the po nt of -'-the"penci'l 'ior 'styhismay be inserted wherebyit will-trace a line" upon the paper inaccor'dance with themove- 5' "merits of the scribing portion 8.v Fig. 7 illustrate", (5' e use of the a pliance, 1-20 the scriberbeing shown in coeperationyvith e g the teinple't forthe purpose of produci 7 an oval "out-line which an fainplification of the marginal outline "of sa id 't'einpl'et. The

slot 10 of the scriber takes "over"the pin 4; 1 25 and the fin eriece 13 is -'11s"ed'to" move the scriber through the circuit I of the-pattern .and. "t i-cause the pin, 12 to 'bear againstthe pattern edge of the templet'; Inthecase of all outlines which are not circular andwhich i ao 'For this purpose; it is con- 1 1 may, therefore, be termedirregular outlines, v

the scriber will perform both pivotal and .slidable movements relatively to the templet and in such movements it will be centered 'by the pin 4 in cooperation with the slot 10 In Fig. 7 there is also shown the reproduction in differing degrees of amplitude of two ovals conforming to the templet E, the pencil or stylus in one operation having been placed in one of the apertures .14 and in the succeeding operation having been placed in an adjacent aperture 14:.

Fig. 8 illustrates the use of the scriber in connection with the templet 5. In this case it is preferred to center the scriber relatively to the pin of the templet by means of the opening 11, thus eliminating any possibility of the sliding play which is necessary when the scriber is used with a templet having an irregular, i. 6., non-circular pattern ed e. The templet 5 is, as explained, intende for use where the circle drawn is to be marked off into divisions; and in such use the slot 10is of value in that it will singly expose each of the graduations 6 dur ing the revolution of the scriber and will enable said raduations to be readily counted, there y to facilitate the marking of the circles into divisions. For example, the circle shown in Fig. 8 has been marked off into eight equal portions to enable an octagon to be produced'as the ultimate outline; and with a templet as shown, having twenty-four graduations, the graduations are counted during the movement of the scriber in groups of three, a mark on the perimeter of the circle being made each time that the third graduation of the group is exposed through the slot 10.

It is also obvious that any of the templets 1 may be used for drawing circles by fitting the aperture 11 of the scriber over their pins 4; in such use the pattern edges of the templets will, of course, have no. function.

Where it may be desired to drawa circle smaller than the smallest circle which can be drawn by the scriber from any radius taken from the opening 11,'the templet A of Fig. 1 is used and in such use the slot 10 is fitted over the pin 4 whereby thecircular edge of the templet will function as a pattern edge.

It will be apparent from the foregoing description that the pattern lines may be reproduced with precislon and facility and that the amplitude of reproduction may be selectively varied through a wide range.

The equipment above described is complete in itself both inventively and func tionally but its greatest value is realized when it is employed in connection with conventional drawing auxiliaries, such as the draftsmens ruler and square.

Having fully described my invention, I claim Y 1. An educational device including, a plurality of templets having pattern edges of different configuration and each templet having a pin projecting from the upper surface thereof, a scriber arm adapted to be used separately and selectively with any one of said templets and having a longitudinal slot therein for engaging said pin, and a pin fixed to said arm adapted to cooperate with said pattern edges for tracing the contour thereof on an amplified scale. I 2. An educational device of the character described including, a scriber arm having a guiding portion provided with a dependin pin and formed witha longitudinal slot, said scriber arm also having a scribing portion off-set from said guiding portion, a plurality of templets each having upper and lower substantially flat bearing faces adapted to contact respectively with said guiding portion and the paper on which the deslgns are to be drawn, a pattern edge adapted to cooperate with said depending pin in guiding the scriber arm, and a pin projecting from the upper surface thereof for engaging in said longitudinal slot, whereby said scriber arm may be used separately and selectively with any one of said templets for tracing'the outline of their pattern edges.

3. An educational device including, in combination, a templet having upper and lower substantially flat bearing faces, a circular pattern edge, a pin projecting from the center of the upper face, and a plurality of marginal graduations on said upper face subdividing the circle into a number of equal parts, and a scriber arm having an aperture adapted'to engage said pin and a v longitudinal slot adapted to expose individual graduations to the view of the operator of the scriber arm.

In testimony whereof I have hereunto set my hand in presence of two subscribing wits IIGSSGS.

RAMON J. BUSTILLO Y DIEGO. 

